Breaks
Asked by Ruby Sep 14, 2018 at 01:38 PM about the 2004 GMC Sierra 1500 4 Dr SLE 4WD Extended Cab LB
Question type: Maintenance & Repair
My front breaks are locking on my 2004 gmc Sierra 1500
5.3 and the rear wont work I have replace the rear hose for
the passenger side and caliper as well have also replace
the master cylinder but still having the problem anyone
knows what's going on?
2 Answers
Brakes hoses can block fluid return when they go bad, you've replaced one but still have another 3 that may be suspect. You also might have a steel line that can also be bad, when they rust they can shrink interior diameter, even a rusty clamp can cause compression on the line. But usually when all 4 brakes are locking up it's the master cylinder. If you had a shop do this have them look over their work. not only does a MC need to be bench bled the ABS distribution block should be cycled to ensure no air is trapped in system.